1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #include "xfs.h"
7 #include "xfs_fs.h"
8 #include "xfs_shared.h"
9 #include "xfs_format.h"
10 #include "xfs_log_format.h"
11 #include "xfs_inode.h"
12 #include "xfs_trans.h"
13 #include "xfs_trans_priv.h"
14 #include "xfs_inode_item.h"
15
16 #include <linux/iversion.h>
17
18 /*
19 * Add a locked inode to the transaction.
20 *
21 * The inode must be locked, and it cannot be associated with any transaction.
22 * If lock_flags is non-zero the inode will be unlocked on transaction commit.
23 */
24 void
25 xfs_trans_ijoin(
26 struct xfs_trans *tp,
27 struct xfs_inode *ip,
28 uint lock_flags)
29 {
30 xfs_inode_log_item_t *iip;
31
32 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
33 if (ip->i_itemp == NULL)
34 xfs_inode_item_init(ip, ip->i_mount);
35 iip = ip->i_itemp;
36
37 ASSERT(iip->ili_lock_flags == 0);
38 iip->ili_lock_flags = lock_flags;
39
40 /*
41 * Get a log_item_desc to point at the new item.
42 */
43 xfs_trans_add_item(tp, &iip->ili_item);
44 }
45
46 /*
47 * Transactional inode timestamp update. Requires the inode to be locked and
48 * joined to the transaction supplied. Relies on the transaction subsystem to
49 * track dirty state and update/writeback the inode accordingly.
50 */
51 void
52 xfs_trans_ichgtime(
53 struct xfs_trans *tp,
54 struct xfs_inode *ip,
55 int flags)
56 {
57 struct inode *inode = VFS_I(ip);
58 struct timespec64 tv;
59
60 ASSERT(tp);
61 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
62
63 tv = current_time(inode);
64
65 if (flags & XFS_ICHGTIME_MOD)
66 inode->i_mtime = tv;
67 if (flags & XFS_ICHGTIME_CHG)
68 inode->i_ctime = tv;
69 if (flags & XFS_ICHGTIME_CREATE) {
70 ip->i_d.di_crtime.t_sec = (int32_t)tv.tv_sec;
71 ip->i_d.di_crtime.t_nsec = (int32_t)tv.tv_nsec;
72 }
73 }
74
75 /*
76 * This is called to mark the fields indicated in fieldmask as needing
77 * to be logged when the transaction is committed. The inode must
78 * already be associated with the given transaction.
79 *
80 * The values for fieldmask are defined in xfs_inode_item.h. We always
81 * log all of the core inode if any of it has changed, and we always log
82 * all of the inline data/extents/b-tree root if any of them has changed.
83 */
84 void
85 xfs_trans_log_inode(
86 xfs_trans_t *tp,
87 xfs_inode_t *ip,
88 uint flags)
89 {
90 struct inode *inode = VFS_I(ip);
91
92 ASSERT(ip->i_itemp != NULL);
93 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
94
95 /*
96 * Don't bother with i_lock for the I_DIRTY_TIME check here, as races
97 * don't matter - we either will need an extra transaction in 24 hours
98 * to log the timestamps, or will clear already cleared fields in the
99 * worst case.
100 */
101 if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) {
102 spin_lock(&inode->i_lock);
103 inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
104 spin_unlock(&inode->i_lock);
105 }
106
107 /*
108 * Record the specific change for fdatasync optimisation. This
109 * allows fdatasync to skip log forces for inodes that are only
110 * timestamp dirty. We do this before the change count so that
111 * the core being logged in this case does not impact on fdatasync
112 * behaviour.
113 */
114 ip->i_itemp->ili_fsync_fields |= flags;
115
116 /*
117 * First time we log the inode in a transaction, bump the inode change
118 * counter if it is configured for this to occur. While we have the
119 * inode locked exclusively for metadata modification, we can usually
120 * avoid setting XFS_ILOG_CORE if no one has queried the value since
121 * the last time it was incremented. If we have XFS_ILOG_CORE already
122 * set however, then go ahead and bump the i_version counter
123 * unconditionally.
124 */
125 if (!test_and_set_bit(XFS_LI_DIRTY, &ip->i_itemp->ili_item.li_flags) &&
126 IS_I_VERSION(VFS_I(ip))) {
127 if (inode_maybe_inc_iversion(VFS_I(ip), flags & XFS_ILOG_CORE))
128 flags |= XFS_ILOG_CORE;
129 }
130
131 tp->t_flags |= XFS_TRANS_DIRTY;
132
133 /*
134 * Always OR in the bits from the ili_last_fields field.
135 * This is to coordinate with the xfs_iflush() and xfs_iflush_done()
136 * routines in the eventual clearing of the ili_fields bits.
137 * See the big comment in xfs_iflush() for an explanation of
138 * this coordination mechanism.
139 */
140 flags |= ip->i_itemp->ili_last_fields;
141 ip->i_itemp->ili_fields |= flags;
142 }
143
144 int
145 xfs_trans_roll_inode(
146 struct xfs_trans **tpp,
147 struct xfs_inode *ip)
148 {
149 int error;
150
151 xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE);
152 error = xfs_trans_roll(tpp);
153 if (!error)
154 xfs_trans_ijoin(*tpp, ip, 0);
155 return error;
156 }